Influence of σ* and varphi Mesons on Λ Hyperon 1S0 Superfluidity in Neutron Star Matter
Abstract
Within the framework of the relativistic mean field theory, we investigate the 1S0 superfluidity (SF) of Λ hyperons in neutron star (NS) matter including σ* and varphi mesons. The energy gap of Λ hyperons is calculated with the Nijmegen one-boson-exchange potentials for a ΛΛ pair. The parameter set we use is in line with the recent experimental data ΔBΛΛ~1.01±0.20+0.18-0.11MeV. It is found that with σ* and varphi mesons the pairing energy gap ΔF of Λ hyperons and the corresponding SF critical temperature TCΛ are suppressed. In addition the NS mass range of Λ hyperon SF is enlarged obviously.
- Publication:
-
Chinese Physics Letters
- Pub Date:
- May 2012
- DOI:
- 10.1088/0256-307X/29/5/059701
- Bibcode:
- 2012ChPhL..29e9701X